80 These words give a wonderful picture of the Cure of Ars as a catechism teacher and as a preacher. And when, towards the end of his life on earth, his voice was too weak to carry to his listeners, the sparkle and gleam of his eyes, his tears, his sighs of divine love, the bitter sorrow he evidenced when the mere concept of sin came to his mind, were enough to convert to a better way of life the faithful who surrounded his pulpit. How could anyone help being moved deeply with a life so completely dedicated to Christ shining so clearly there before him?
Source: Sacerdotii Nostri Primordia (Vatican.va)